Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é o mecanismo usado para as rodadas 5-6?
 ###Tabelas: CREATE TABLE table_of_federal_taxation_and_spending_by_state (table_of_federal_taxation_and_spending_by_state_id AUTO_INCREMENT PRIMARY KEY, State VARCHAR, Revenue (millions) VARCHAR, Population INT, Revenue per capita VARCHAR, Spending (millions) VARCHAR, Spending per capita VARCHAR, Net contribution per capita VARCHAR) CREATE TABLE verbal_derivatives (verbal_derivatives_id AUTO_INCREMENT PRIMARY KEY, Type VARCHAR, Suffix VARCHAR, Valency change VARCHAR, Example VARCHAR, Meaning VARCHAR) CREATE TABLE list_of_champions (list_of_champions_id AUTO_INCREMENT PRIMARY KEY, Year VARCHAR, Champion VARCHAR, Runner-Up VARCHAR, 3rd Place VARCHAR, Location VARCHAR) CREATE TABLE education (education_id AUTO_INCREMENT PRIMARY KEY, School VARCHAR, Locality VARCHAR, Description VARCHAR, Ofsted INT, Website VARCHAR) CREATE TABLE drivers_and_constructors (drivers_and_constructors_id AUTO_INCREMENT PRIMARY KEY, Constructor VARCHAR, Chassis VARCHAR, Engine VARCHAR, Tyres VARCHAR, Driver VARCHAR, Rounds VARCHAR)  
SELECT Engine FROM drivers_and_constructors WHERE Rounds = 5-6